FK to inherited table, referential integrity violation

Is it bug?

CREATE TABLE base ( base INT PRIMARY KEY );
CREATE TABLE child ( val INT ) INHERITS ( base );
CREATE TABLE ref (
      atr INT
    , base INT REFERENCES base ON UPDATE cascade ON DELETE cascade );

INSERT INTO child VALUES ( 1, 2 );

SELECT * FROM base;
 base
------
    1

SELECT * FROM child;
 base | val
------+-----
    1 |   2

INSERT INTO ref VALUES ( 3, 1 );

ERROR:  $1 referential integrity violation - key referenced from ref not
found in base

--
 oo  don't worry
\__/ be happy